<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./index.css">
</head>
<body>
  <h1>Scroll to see the animation</h1>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  <div class="box">
    <h2>Content</h2>
  </div>
  
  <script src="./index.js"></script>
</body>
</html>